linux-kernel - [PATCH for-6.18/block 00/16] block: fix reordered IO in the case recursive split

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Message-Id: <20250905070643.2533483-1-yukuai1@huaweicloud.com>
Date: Fri,  5 Sep 2025 15:06:27 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: hch@...radead.org,
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Subject: [PATCH for-6.18/block 00/16] block: fix reordered IO in the case recursive split

From: Yu Kuai <yukuai3@...wei.com>

Changes from RFC v3:
 - initialize bio->issue_time_ns in blk_mq_submit_bio, patch 2;
 - set/clear new queue_flag when iolatency is enabled/disabled, patch 3;
 - fix compile problem for md-linear, patch 12;
 - make should_fail_bio() non-static, and open code new helper, patch 14;
 - remove the checking for zoned disk, patch 15;
Changes from RFC v2:
 - add patch 1,2 to cleanup bio_issue;
 - add patch 3,4 to fix missing processing for split bio first;
 - bypass zoned device in patch 14;
Changes from RFC:
 - export a new helper bio_submit_split_bioset() instead of
export bio_submit_split() directly;
 - don't set no merge flag in the new helper;
 - add patch 7 and patch 10;
 - add patch 8 to skip bio checks for resubmitting split bio;

patch 1-5 cleanup bio_issue, and fix missing processing for split bio;
patch 6 export a bio split helper;
patch 7-13 unify bio split code;
path 14,15 convert the helper to insert split bio to the head of current
bio list;
patch 16 is a follow cleanup for raid0;

Yu Kuai (16):
  block: cleanup bio_issue
  block: initialize bio issue time in blk_mq_submit_bio()
  blk-mq: add QUEUE_FLAG_BIO_ISSUE_TIME
  md: fix mssing blktrace bio split events
  blk-crypto: fix missing blktrace bio split events
  block: factor out a helper bio_submit_split_bioset()
  md/raid0: convert raid0_handle_discard() to use
    bio_submit_split_bioset()
  md/raid1: convert to use bio_submit_split_bioset()
  md/raid10: add a new r10bio flag R10BIO_Returned
  md/raid10: convert read/write to use bio_submit_split_bioset()
  md/raid5: convert to use bio_submit_split_bioset()
  md/md-linear: convert to use bio_submit_split_bioset()
  blk-crypto: convert to use bio_submit_split_bioset()
  block: skip unnecessary checks for split bio
  block: fix reordered IO in the case recursive split
  md/raid0: convert raid0_make_request() to use
    bio_submit_split_bioset()

 block/bio.c                 |  2 +-
 block/blk-cgroup.h          |  6 ----
 block/blk-core.c            | 19 ++++++-----
 block/blk-crypto-fallback.c | 16 ++++------
 block/blk-iolatency.c       | 19 +++++------
 block/blk-merge.c           | 64 +++++++++++++++++++++++++------------
 block/blk-mq-debugfs.c      |  1 +
 block/blk-mq.c              |  3 ++
 block/blk-throttle.c        |  2 +-
 block/blk.h                 | 45 ++------------------------
 drivers/md/md-linear.c      | 14 ++------
 drivers/md/raid0.c          | 30 ++++++-----------
 drivers/md/raid1.c          | 38 ++++++++--------------
 drivers/md/raid1.h          |  4 ++-
 drivers/md/raid10.c         | 54 ++++++++++++++-----------------
 drivers/md/raid10.h         |  2 ++
 drivers/md/raid5.c          | 10 +++---
 include/linux/blk_types.h   |  7 ++--
 include/linux/blkdev.h      |  3 ++
 19 files changed, 141 insertions(+), 198 deletions(-)

-- 
2.39.2